Manhole covers, everywhere
But
When you're walking on the road or driving on the road
Suddenly found the upper manhole cover in front of me
Involuntarily "danced" with a bang
What is your expression?
Recently
A section of the road in Pengjiang District, Jiangmen, Guangdong
A manhole cover is on fire all over the network......
Why?
Because it has always been free to "dance"
▽ This scene
It happened on June 28
Qunhua Road, Duruan Town, Pengjiang District, Jiangmen City
Near Science Park 15
"I think it's dangerous.
There is a petrol station nearby.
The manhole cover is so high that it is warped,
Shake it up like boiling water. ”
See this
Nearby neighbors are curious and worried
Curious, why does the manhole cover keep jumping?
The concern is whether there is an unknown gas inside
Will there be safety hazards?
"Could it be that the terrain is low?"
"Could it be that there is biogas down there?"
"Isn't there biogas down there?
Unstable gas pressure, coupled with thermal expansion and contraction"
Because the manhole cover is right in the middle of the road
So everyone is worried
Throw out the manhole cover
It can adversely affect passing vehicles
So someone dialed 119
Someone dragged a large bundle of twigs and placed them nearby
Alert passing drivers
At noon on the 29th
The reporter came to the scene to visit and found out
There is a lot of traffic on the road
No abnormalities have been found in the manhole cover
There are physics teachers who think
This could be that the manhole cover is lifted by the air flow from the sewer
It usually happens on rainy days
Due to the large amount of rainwater flowing into the sewers
Rainwater compresses the air in the well
The air pressure increases
After that, it "escapes" through less stressful areas such as manholes
Thus jacking up the manhole cover
And this case
It also happens on sunny days
But the "culprit" is not necessarily the neighbors
Concerns about biogas
on this
Pengjiang District Urban Management and Comprehensive Law Enforcement Bureau
Yang Yuan, head of the water supply and drainage management unit, introduced
On the morning of June 28, the backup water source replenished water to the Nazui Reservoir, and the backup water source pipeline was useless for too long, and there were some empty pipes, so in the process of replenishing water, the exhaust valve discharged a large amount of air in the pipe, and it happened that the lock ring on one side of the manhole cover was damaged, so there was a situation in the video.
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Now backup water pipes
It has been filled with water and is operating normally
There was also a lot of air in the ducts
It has not affected driving safety, and a plan has been developed
The manhole cover was replaced on July 1
meantime
The next time the backup water source is activated
Management unit
The official response to the inspection of all exhaust valves of the pipeline will be strengthened
It can be regarded as helping everyone answer their doubts
It turns out that "manhole cover vibration" is such a thing
Learned
Source: Guangdong Minsheng DV site